This paper provides a brief, personal account of the development ground-based gamma-ray astronomy, primarily over last 35 years, with some digressions into earlier history field. Ideas related to imaging Cherenkov events and potential for use arrays were in existence time before technical expertise required their exploitation emerged. There has been occasional controversy, great creativity hero...

The Roma International Conference on Astroparticle Physics covered gamma-ray astronomy, air shower experiments and neutrino astronomy on three successive days. I organize my brief summary comments into four topics that cut across these three techniques. They are detector calibration, galactic sources, extra-galactic sources and cosmology.